The 2026 edition of the Eden Marathon & Half-Marathon returns on 18 October and invites runners into the wild and historic landscapes of Cornwall. With choices of the full marathon or a half-marathon distance, participants will travel through parts of Cornwall’s clay-country and mining heritage zones, including trails, paths and private roads. The event is known for its variety of surface — much of the full marathon covers off-road terrain, while the half-marathon combines paved and trail segments for a mix of speed and challenge. Finishers are rewarded not just with a medal, but a true sense of place, taking in the unique environment of the Eden Project and surrounding countryside. Whether you’re seeking a personal best or simply a memorable running experience, this event offers both endurance and atmosphere.
Races
Scheduled for 18 October 2026, the Eden Marathon invites runners to tackle a rugged, multi-terrain course through Cornwall’s mining heritage and scenic countryside, finishing inside the iconic Eden Project. With approximately 70% of the route on trails and paths, this event presents a serious challenge for those ready to embrace both nature and marathon distance.
On the same day, 18 October 2026, the Eden Half-Marathon offers a shorter but still spectacular route, weaving through Cornwall’s clay country and finishing at the Eden Project. Organised with the same commitment to sustainability and trail spirit, it’s ideal for runners seeking a memorable half-marathon experience amid wildflower habitats and forested terrain.
Weather based on historical averages.
FAQs
What is the Eden Marathon?
How long is the Eden Marathon?
Where does the Eden Marathon take place?
What is the elevation gain of the Eden Marathon?
How can I prepare for the Eden Marathon?
How do I choose the right training plan for the Eden Marathon?
Scheduled for 18 October 2026, the Eden Marathon invites runners to tackle a rugged, multi-terrain course through Cornwall’s mining heritage and scenic countryside, finishing inside the iconic Eden Project. With approximately 70% of the route on trails and paths, this event presents a serious challenge for those ready to embrace both nature and marathon distance.
The Eden Marathon is 42km long.
The Eden Marathon takes place in St Austell, Cornwall, UK.
Runna classifies the Eden Marathon elevation profile as Rolling.
The best way to train for the next race is to use a personalized training plan that takes into account your current running ability, schedule, and preferences.
This will help you steadily improve your running performance and get ready for the race without risking an injury.
Check out our training plans to find the best running program for your goals!
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalized training plans for every runner and every goal: Whether this is your first, 10th or 100th race, we'll help you get the most out of your training and smash your goals.
Check out our training plans to find the best running program for your goals!
What is the Eden Marathon?
Scheduled for 18 October 2026, the Eden Marathon invites runners to tackle a rugged, multi-terrain course through Cornwall’s mining heritage and scenic countryside, finishing inside the iconic Eden Project. With approximately 70% of the route on trails and paths, this event presents a serious challenge for those ready to embrace both nature and marathon distance.
How long is the Eden Marathon?
The Eden Marathon is 42km long.
Where does the Eden Marathon take place?
The Eden Marathon takes place in St Austell, Cornwall, UK.
What is the elevation gain of the Eden Marathon?
Runna classifies the Eden Marathon elevation profile as Rolling.
How can I prepare for the Eden Marathon?
The best way to train for the next race is to use a personalized training plan that takes into account your current running ability, schedule, and preferences.
This will help you steadily improve your running performance and get ready for the race without risking an injury.
Check out our training plans to find the best running program for your goals!
How do I choose the right training plan for the Eden Marathon?
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalized training plans for every runner and every goal: Whether this is your first, 10th or 100th race, we'll help you get the most out of your training and smash your goals.
Check out our training plans to find the best running program for your goals!
What is the Eden Half Marathon?
How long is the Eden Half Marathon?
Where does the Eden Half Marathon take place?
What is the elevation gain of the Eden Half Marathon?
How can I prepare for the Eden Half Marathon?
How do I choose the right training plan for the Eden Half Marathon?
On the same day, 18 October 2026, the Eden Half-Marathon offers a shorter but still spectacular route, weaving through Cornwall’s clay country and finishing at the Eden Project. Organised with the same commitment to sustainability and trail spirit, it’s ideal for runners seeking a memorable half-marathon experience amid wildflower habitats and forested terrain.
The Eden Half Marathon is 21km long.
The Eden Half Marathon takes place in St Austell, Cornwall, UK.
Runna classifies the Eden Half Marathon elevation profile as Rolling.
The best way to train for the next race is to use a personalized training plan that takes into account your current running ability, schedule, and preferences.
This will help you steadily improve your running performance and get ready for the race without risking an injury.
Check out our training plans to find the best running program for your goals!
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalized training plans for every runner and every goal: Whether this is your first, 10th or 100th race, we'll help you get the most out of your training and smash your goals.
Check out our training plans to find the best running program for your goals!
What is the Eden Half Marathon?
On the same day, 18 October 2026, the Eden Half-Marathon offers a shorter but still spectacular route, weaving through Cornwall’s clay country and finishing at the Eden Project. Organised with the same commitment to sustainability and trail spirit, it’s ideal for runners seeking a memorable half-marathon experience amid wildflower habitats and forested terrain.
How long is the Eden Half Marathon?
The Eden Half Marathon is 21km long.
Where does the Eden Half Marathon take place?
The Eden Half Marathon takes place in St Austell, Cornwall, UK.
What is the elevation gain of the Eden Half Marathon?
Runna classifies the Eden Half Marathon elevation profile as Rolling.
How can I prepare for the Eden Half Marathon?
The best way to train for the next race is to use a personalized training plan that takes into account your current running ability, schedule, and preferences.
This will help you steadily improve your running performance and get ready for the race without risking an injury.
Check out our training plans to find the best running program for your goals!
How do I choose the right training plan for the Eden Half Marathon?
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalized training plans for every runner and every goal: Whether this is your first, 10th or 100th race, we'll help you get the most out of your training and smash your goals.
Check out our training plans to find the best running program for your goals!
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Sport:
Running
Tags:
Nature
This event listing is for informational purposes only. Runna is not affiliated with, endorsed by, or sponsored by Eden Marathon and Half-Marathon or Eden Project. All event details are based on publicly available information and are provided solely to help users discover running events. Runna does not use any official logos, images, or proprietary content from this event or its organiser. Any trademarks or names mentioned are used descriptively to identify the event in a factual manner. For the most accurate and up to date information (including to register or purchase an entry to the event), please visit the Eden Marathon and Half-Marathon website.
